diff --git a/.github/workflows/mobile-eas-production.yml b/.github/workflows/mobile-eas-production.yml
index 2e61de6039e..bc335ef99cc 100644
--- a/.github/workflows/mobile-eas-production.yml
+++ b/.github/workflows/mobile-eas-production.yml
@@ -5,6 +5,23 @@ name: Mobile EAS Production
 # in the same OS/pnpm as the EAS build; a macOS `eas build` computes a different
 # fingerprint (platform-specific deps + pnpm version) and errors. On this Linux
 # runner, with corepack pinning pnpm 10.24 in eas.json, local == build.
+#
+# Every merge to main that touches the mobile app reconciles, per platform:
+#   1. Store builds: if the latest production build's version differs from
+#      app.config.ts, cut a new build with --auto-submit (TestFlight +
+#      Play internal track). Bumping `version` is therefore all it takes to
+#      start the next release train — the first build of a version enters
+#      external-TestFlight beta review immediately, and later builds of the
+#      same version auto-approve. Releasing to the App Store stays a manual
+#      App Store Connect step.
+#   2. OTA: publish a production-channel update for each platform where at
+#      least one finished production build matches the current native
+#      fingerprint. Old-version binaries with a matching fingerprint receive
+#      it too. When native drift means no binary could install the update,
+#      it is skipped and flagged in the job summary instead of published
+#      into the void.
+# workflow_dispatch remains as a manual override for both modes (e.g. to
+# retry an errored build or force an OTA).
 on:
   workflow_dispatch:
     inputs:
@@ -29,10 +46,30 @@ on:
         description: "OTA update message (mode=update only)"
         required: false
         type: string
+  push:
+    branches: [main]
+    paths:
+      - apps/mobile/**
+      - packages/client-runtime/**
+      - packages/contracts/**
+      - packages/shared/**
+      - assets/**
+      - scripts/**
+      - patches/**
+      - pnpm-lock.yaml
+      - pnpm-workspace.yaml
+      - .github/workflows/mobile-eas-production.yml
+
+# Serialize runs so OTAs publish in merge order. GitHub keeps at most one
+# queued run per group, so a burst of merges collapses into one run of the
+# newest commit — intermediate commits don't need their own OTA.
+concurrency:
+  group: mobile-eas-production
+  cancel-in-progress: false
 
 jobs:
   production:
-    name: EAS Production ${{ inputs.mode }}
+    name: EAS Production ${{ github.event_name == 'push' && 'auto' || inputs.mode }}
     runs-on: blacksmith-8vcpu-ubuntu-2404
     permissions:
       contents: read
@@ -98,15 +135,15 @@ jobs:
           EXPO_TOKEN: ${{ secrets.EXPO_TOKEN }}
         run: eas env:pull production --non-interactive
 
-      - name: Build and submit
-        if: steps.expo-token.outputs.present == 'true' && inputs.mode == 'build'
+      - name: Build and submit (manual)
+        if: steps.expo-token.outputs.present == 'true' && github.event_name == 'workflow_dispatch' && inputs.mode == 'build'
         working-directory: apps/mobile
         env:
           EXPO_TOKEN: ${{ secrets.EXPO_TOKEN }}
         run: eas build --platform ${{ inputs.platform }} --profile production --auto-submit --non-interactive --no-wait
 
-      - name: Publish OTA update
-        if: steps.expo-token.outputs.present == 'true' && inputs.mode == 'update'
+      - name: Publish OTA update (manual)
+        if: steps.expo-token.outputs.present == 'true' && github.event_name == 'workflow_dispatch' && inputs.mode == 'update'
         working-directory: apps/mobile
         env:
           EXPO_TOKEN: ${{ secrets.EXPO_TOKEN }}
@@ -117,3 +154,62 @@ jobs:
             --platform ${{ inputs.platform }} \
             --message "${{ inputs.message || format('Production OTA ({0})', github.sha) }}" \
             --non-interactive
+
+      # No --status filter on build:list: an in-queue/in-progress build must
+      # count as existing, or every merge during the build window would cut a
+      # duplicate. Builds started here stay attached to this serialized run so
+      # the queued run for a later merge cannot overtake them and lose its OTA.
+      # After an errored build, retry via workflow_dispatch mode=build — pushes
+      # won't re-trigger it until the app version changes.
+      - id: store_builds
+        name: Ensure store builds exist for the current app version
+        if: steps.expo-token.outputs.present == 'true' && github.event_name == 'push'
+        continue-on-error: true
+        working-directory: apps/mobile
+        env:
+          EXPO_TOKEN: ${{ secrets.EXPO_TOKEN }}
+        run: |
+          failed=0
+          version="$(npx expo config --json --type public | jq -r '.version')"
+          for platform in ios android; do
+            latest="$(eas build:list --platform "$platform" --build-profile production --limit 1 --json --non-interactive | jq -r '.[0].appVersion // "none"')"
+            if [ "$latest" = "$version" ]; then
+              echo "$platform: production build for $version already exists (or is in progress)"
+              continue
+            fi
+            echo "$platform: latest production build is $latest, app.config.ts says $version — building"
+            if eas build --platform "$platform" --profile production --auto-submit --non-interactive; then
+              echo ":building_construction: $platform: cut production build for $version (auto-submitted)" >> "$GITHUB_STEP_SUMMARY"
+            else
+              failed=1
+              echo ":x: $platform: production build or submission failed for $version" >> "$GITHUB_STEP_SUMMARY"
+            fi
+          done
+          exit "$failed"
+
+      - name: Publish fingerprint-gated OTA
+        if: steps.expo-token.outputs.present == 'true' && github.event_name == 'push'
+        working-directory: apps/mobile
+        env:
+          EXPO_TOKEN: ${{ secrets.EXPO_TOKEN }}
+        run: |
+          message="$(git log -1 --pretty=%s | head -c 120) ($(git rev-parse --short=9 HEAD))"
+          for platform in ios android; do
+            hash="$(eas fingerprint:generate --platform "$platform" --environment production --json --non-interactive | jq -r '.hash')"
+            matching="$(eas build:list --platform "$platform" --build-profile production --status finished --fingerprint-hash "$hash" --limit 1 --json --non-interactive | jq 'length')"
+            if [ "$matching" -gt 0 ]; then
+              eas update \
+                --channel production \
+                --environment production \
+                --platform "$platform" \
+                --message "$message" \
+                --non-interactive
+              echo ":white_check_mark: $platform: OTA published to production (fingerprint \`$hash\`)" >> "$GITHUB_STEP_SUMMARY"
+            else
+              echo ":warning: $platform: no finished production build matches fingerprint \`$hash\` — OTA skipped; JS changes reach $platform only once a matching build ships" >> "$GITHUB_STEP_SUMMARY"
+            fi
+          done
+
+      - name: Propagate store build failure
+        if: steps.store_builds.outcome == 'failure'
+        run: exit 1
diff --git a/.github/workflows/mobile-fingerprint-check.yml b/.github/workflows/mobile-fingerprint-check.yml
new file mode 100644
index 00000000000..fd98817cd10
--- /dev/null
+++ b/.github/workflows/mobile-fingerprint-check.yml
@@ -0,0 +1,205 @@
+name: Mobile Fingerprint Check
+
+# Detects whether a PR changes the native fingerprint — i.e. whether merging
+# it would leave main un-OTA-able until a new store build ships. Native-change
+# PRs get the "📱 Native Change" label so they can be held and merged as a
+# batch right before the next store submission, keeping main OTA-able for
+# everything else in between. (Once one native PR merges, every later merge
+# inherits the drifted fingerprint and loses OTA reach too — that is why the
+# signal has to fire before merge, not after.)
+#
+# The check is advisory: it always passes, the label is the signal. Both
+# fingerprints are computed in this one job (same OS, same corepack-pinned
+# pnpm), so the comparison is self-consistent; no EXPO_TOKEN needed.
+on:
+  pull_request:
+    paths:
+      - apps/mobile/**
+      - packages/client-runtime/**
+      - packages/contracts/**
+      - packages/shared/**
+      - assets/**
+      - scripts/**
+      - patches/**
+      - pnpm-lock.yaml
+      - pnpm-workspace.yaml
+      - .github/workflows/mobile-fingerprint-check.yml
+
+concurrency:
+  group: mobile-fingerprint-check-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  fingerprint:
+    name: Native fingerprint diff
+    runs-on: blacksmith-8vcpu-ubuntu-2404
+    permissions:
+      contents: read
+      issues: write
+      pull-requests: write
+    env:
+      APP_VARIANT: production
+      NODE_OPTIONS: --max-old-space-size=8192
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          # Default pull_request checkout is the merge commit (PR applied on
+          # top of base), so the "head" fingerprint is the state main would
+          # actually be in after merging — stale branches compare cleanly.
+          fetch-depth: 0
+
+      - name: Setup Vite+
+        uses: voidzero-dev/setup-vp@v1
+        with:
+          node-version-file: package.json
+          cache: true
+          run-install: |
+            args:
+              - --filter=@t3tools/mobile...
+
+      - name: Expose pnpm
+        run: |
+          pnpm_version="$(node --print "require('./package.json').packageManager.split('@').pop()")"
+          vp_pnpm_bin="$HOME/.vite-plus/package_manager/pnpm/$pnpm_version/pnpm/bin"
+          echo "$vp_pnpm_bin" >> "$GITHUB_PATH"
+          "$vp_pnpm_bin/pnpm" --version
+
+      - name: Fingerprint merge result
+        working-directory: apps/mobile
+        run: |
+          mkdir -p "$RUNNER_TEMP/fp/head" "$RUNNER_TEMP/fp/base"
+          for platform in ios android; do
+            npx expo-updates fingerprint:generate --platform "$platform" > "$RUNNER_TEMP/fp/head/$platform.json"
+          done
+
+      - name: Fingerprint base
+        run: |
+          git checkout --quiet "${{ github.event.pull_request.base.sha }}"
+          # Re-sync node_modules to the base commit's lockfile before
+          # fingerprinting — a dep-changing PR must not fingerprint the base
+          # against head's installed packages.
+          pnpm install --filter=@t3tools/mobile...
+          cd apps/mobile
+          for platform in ios android; do
+            npx expo-updates fingerprint:generate --platform "$platform" > "$RUNNER_TEMP/fp/base/$platform.json"
+          done
+
+      - id: compare
+        name: Compare fingerprints
+        run: |
+          changed=""
+          {
+            echo "## Native fingerprint diff"
+            echo
+            for platform in ios android; do
+              head_hash="$(jq -r .hash "$RUNNER_TEMP/fp/head/$platform.json")"
+              base_hash="$(jq -r .hash "$RUNNER_TEMP/fp/base/$platform.json")"
+              if [ "$head_hash" = "$base_hash" ]; then
+                echo "- ✅ **$platform**: unchanged (\`$head_hash\`) — OTA-compatible"
+                continue
+              fi
+              changed="$changed $platform"
+              echo "- 📱 **$platform**: \`$base_hash\` → \`$head_hash\` — merging requires a new native build before OTAs work again"
+              jq -r -n \
+                --slurpfile h "$RUNNER_TEMP/fp/head/$platform.json" \
+                --slurpfile b "$RUNNER_TEMP/fp/base/$platform.json" '
+                  ($b[0].sources | map({ (.filePath // .id): .hash }) | add // {}) as $bm
+                  | $h[0].sources[]
+                  | select($bm[(.filePath // .id)] != .hash)
+                  | "  - \(.type): `\(.filePath // .id)`"'
+            done
+          } >> "$GITHUB_STEP_SUMMARY"
+          echo "changed_platforms=${changed# }" >> "$GITHUB_OUTPUT"
+
+      - name: Sync native change label
+        # Fork PRs get a read-only token under pull_request; the check stays
+        # advisory there (summary only). This workflow must not move to
+        # pull_request_target — it installs and runs PR code.
+        if: github.event.pull_request.head.repo.full_name == github.repository
+        uses: actions/github-script@v8
+        env:
+          CHANGED_PLATFORMS: ${{ steps.compare.outputs.changed_platforms }}
+        with:
+          script: |
+            const managedLabel = {
+              name: "📱 Native Change",
+              color: "d93f0b",
+              description:
+                "Changes the native fingerprint; merging blocks production OTAs until a new store build ships.",
+            };
+            const nativeChanged = (process.env.CHANGED_PLATFORMS ?? "").trim() !== "";
+            const issueNumber = context.payload.pull_request.number;
+
+            try {
+              const { data: existing } = await github.rest.issues.getLabel({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                name: managedLabel.name,
+              });
+
+              if (
+                existing.color !== managedLabel.color ||
+                (existing.description ?? "") !== managedLabel.description
+              ) {
+                await github.rest.issues.updateLabel({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  name: managedLabel.name,
+                  color: managedLabel.color,
+                  description: managedLabel.description,
+                });
+              }
+            } catch (error) {
+              if (error.status !== 404) {
+                throw error;
+              }
+
+              try {
+                await github.rest.issues.createLabel({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  name: managedLabel.name,
+                  color: managedLabel.color,
+                  description: managedLabel.description,
+                });
+              } catch (createError) {
+                if (createError.status !== 422) {
+                  throw createError;
+                }
+              }
+            }
+
+            const { data: currentLabels } = await github.rest.issues.listLabelsOnIssue({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: issueNumber,
+              per_page: 100,
+            });
+            const hasLabel = currentLabels.some((label) => label.name === managedLabel.name);
+
+            if (nativeChanged && !hasLabel) {
+              await github.rest.issues.addLabels({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: issueNumber,
+                labels: [managedLabel.name],
+              });
+            } else if (!nativeChanged && hasLabel) {
+              try {
+                await github.rest.issues.removeLabel({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: issueNumber,
+                  name: managedLabel.name,
+                });
+              } catch (removeError) {
+                if (removeError.status !== 404) {
+                  throw removeError;
+                }
+              }
+            }
+
+            core.info(
+              `PR #${issueNumber}: native fingerprint ${nativeChanged ? `changed (${process.env.CHANGED_PLATFORMS})` : "unchanged"}`,
+            );